why is 1 volt dropping across this 50 ohm series resistor in my DC protection?

[blackieNYC]

I'm using this power supply protection circuit http://www.muzique.com/news/reverse-voltage-protection/ at the power input to a 4-circuit multi-pedal.  After this protection circuit, the power is distributed in parallel to the 4 pedal circuits.  The DC load of all four measures about 7k ohms, which seems reasonable.
The 9.6volt drops to 9.3 volts across a series schottky diode.  The 50 ohm resistor drops this down to 8.3 volts.  if I jumper across the 50ohm, I get the 9.3v output I would expect.  It measures 50 ohms - what's going on here?

[roseblood11]

It's just the spooky Mr. Ohm...
http://www.gtsparkplugs.com/Dropping_Resistor_Calc.html

[anotherjim]

Means 20mA, which isn't unreasonable.
Measuring the resistance of the circuit loads won't be accurate. The DMM test won't bias things on, maybe not even forward bias any input protection diodes properly. Measuring the voltage drop across a known value resistor that is in series with the total load is a good way to find the total current.
then 9.6v/.02A is a 480R effective total load.

[blackieNYC]

Right, right..  thanks guys

[davent]

Is there an indicator LED down line of the resistor? That alone could be sucking a good part of that 20ma of current.
dave